Responsible code: https://github.com/aktos-io/aecad/blob/51c4ebcc50eed8c5b19b3e4f19524744196ed55e/webapps/main/pcb/tools/lib/schema/netlist.ls#L220
Responsible code:
aecad/webapps/main/pcb/tools/lib/schema/netlist.ls
Line 220 in 51c4ebc